Great article. One caveat – not sure John Cage can be described as a collaborator.
“In fact, Lennon influenced Ono as much as Ono influenced Lennon, in ways that improved both of their careers. If her best art before Lennon encouraged a Zen-like dissolution of thought, after Lennon she attached that refusal of distinction and dualism to a greater campaign for world peace, waged not in galleries but in the mass media. ”